機床大件結(jié)構特性分析及其優(yōu)化設計
本文選題:動靜態(tài)特性 切入點:有限元 出處:《沈陽工業(yè)大學》2015年碩士論文 論文類型:學位論文
【摘要】:本文針對結(jié)構優(yōu)化展開研究,對立柱以及床身動、靜態(tài)特性進行了分析并展開了優(yōu)化設計研究。主要研究工作包括: (1)介紹了機床優(yōu)化發(fā)展情況,對于有限元理論及優(yōu)化原則進行了介紹。 (2)對某加工中心進行整機CAD建模,,基于其實際加工情況對其主要部件的受力進行了計算,對其立柱與床身進行了動、靜態(tài)計算。 (3)利用變量化分析的方法,研究了元結(jié)構和框架尺寸的結(jié)構形式及結(jié)構尺寸。分析了元結(jié)構的出砂孔數(shù)目、形狀、大小,筋格的邊長、厚度以及各邊長比例對其基頻影響;同時還研究了立柱、床身基本框架結(jié)構與其低階固有頻率的關系,獲得了框架尺寸與低階固有頻率之間的關系規(guī)律。應用元結(jié)構思想對立柱、床身結(jié)構進行了優(yōu)化設計。 (4)闡述了參數(shù)化建模的思路,并基于此思路對機床的立柱進行了參數(shù)化模型的建立。 (5)根據(jù)前面建立的參數(shù)化CAD模型導入ANSYS Workbench變?yōu)閰?shù)化CAE模型。選擇筋板厚度為設計變量,將設計變量的參數(shù)分兩次進行研究,最后綜合考慮優(yōu)化結(jié)果。以立柱質(zhì)量最輕和最大變形量最小為優(yōu)化目標,以各筋板厚度為優(yōu)化變量,以第一階固有頻率為約束條件,對其進行多目標優(yōu)化,得到Pareto優(yōu)化解集,從而得出優(yōu)化模型,結(jié)果表明,優(yōu)化結(jié)果可靠有效。
[Abstract]:In this paper, the structural optimization is studied, the dynamic and static characteristics of the column and the bed are analyzed and the optimization design is studied. The main research work includes:. The development of machine tool optimization is introduced, and the finite element theory and optimization principle are introduced. 2) based on the CAD model of a machining center, the force of its main parts is calculated, and the dynamic and static calculation of its column and bed is carried out. (3) using the method of variational analysis, the structural form and size of element structure and frame size are studied, and the effects of the number, shape, size, side length, thickness and ratio of each side length of element structure on its fundamental frequency are analyzed. At the same time, the relationship between the basic frame structure of column and bed and its low order natural frequency is studied, and the relationship between frame size and low order natural frequency is obtained, and the optimum design of column and bed structure is carried out by using the idea of element structure. (4) the idea of parameterized modeling is expounded, and the parameterized model of machine tool column is established based on this idea. 5) according to the parameterized CAD model established before, the ANSYS Workbench is transformed into the parameterized CAE model. The thickness of the stiffened plate is selected as the design variable, and the parameters of the design variable are studied in two stages. Finally, the optimization results are considered synthetically. With the minimum of column mass and maximum deformation as the optimization objective, the thickness of each stiffened plate as the optimization variable and the first order natural frequency as the constraint condition, the multi-objective optimization of the column is carried out, and the Pareto optimization solution set is obtained. The results show that the optimization results are reliable and effective.
【學位授予單位】:沈陽工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TG502.3
【參考文獻】
相關期刊論文 前10條
1 陳文鋒,毛漢領,雷力生,曹碩生;MXBS-1320 型高速外圓磨床動態(tài)性能的試驗研究[J];廣西機械;1997年02期
2 張志紅;何楨;郭偉;;在響應曲面方法中三類中心復合設計的比較研究[J];沈陽航空工業(yè)學院學報;2007年01期
3 錢令希;關于結(jié)構力學發(fā)展的思考[J];計算結(jié)構力學及其應用;1994年01期
4 王艷輝,伍建國,繆建成;精密機床床身結(jié)構參數(shù)的優(yōu)化設計[J];機械設計與研究;2003年06期
5 羅輝;陳蔚芳;葉文華;;機床立柱靈敏度分析及多目標優(yōu)化設計[J];機械科學與技術;2009年04期
6 徐燕申,張興朝,牛占文,趙相松;基于元結(jié)構和框架優(yōu)選的數(shù)控機床床身結(jié)構動態(tài)設計研究[J];機械強度;2001年01期
7 楊勇;張為民;李鵬忠;;基于動態(tài)靈敏度分析的數(shù)控機床床身結(jié)構優(yōu)化設計[J];機械設計;2011年09期
8 王富強;芮執(zhí)元;雷春麗;吳沁;;基于元結(jié)構的精密機床床身結(jié)構動態(tài)分析和優(yōu)化[J];機械設計;2012年05期
9 郭壘;張輝;汪勁松;葉佩青;;元結(jié)構方法的理論建模和驗證[J];機械工程學報;2011年23期
10 郭壘;張輝;葉佩青;段廣洪;;基于靈敏度分析的機床輕量化設計[J];清華大學學報(自然科學版);2011年06期
本文編號:1586358
本文鏈接:http://www.sikaile.net/kejilunwen/jinshugongy/1586358.html